Diammonium Phosphate 21-53-0
is a compound that gives 21 N and 53 P2O5. As reaction fertilizer in the soil around a granule acidicication is generated that improves the utilization of phosphorus applied and available in the rhizosphere. Due to its nitrogen content ( present as ammonia), it is good for crops that require these nutrients in its initial phase. Is a product with high solubility in water, which ensures a rapid response to fertilization.
The advantages of DAP
lFully water-soluble
lConsists of 100% plant nutrients
lHighly-concentrated source of phosphorus and nitrogen (as ammonia ) for plants
lFree of chloride, sodium and other detrimental elements for plants
lExcellent for low pH or alkaline soils
lSuitable for the fertigation, foliar application and production of fertilizer blends and nutrient solutions
Compared with MAP:The ammonium present in DAP is an excellent N source and will be gradually converted to nitrate by soil bacteria, resulting in a subsequent drop in pH. Therefore, the rise in soil pH surrounding DAP granules is a temporary effect. This initial rise in soil pH neighboring DAP can influence the micro-site reactions of phosphate and soil organic matter. DAP is alkaline with a high pH, exceeding 7.5. DAP is excellent for low pH or alkaline soils.
| Specification | Tech grade | Superior grade |
| Main content | 99%min | 99%min |
| P2O5 | 53%min | 53%min |
| NasNH4 | 20.8%min | 20.8%min |
| Moisture | 0.2%max | 0.2%max |
| Insolubles | 0.1%max | 0.1%max |
| As | - | 0.0003%max |
| Pb | - | 0.001%max |
| F | - | 0.002%max |